springboot之RocketMq实现

首先，在虚拟机上安装rocketmq和rocketMq可视化控制，安装不做描述。

1、pom.xml文件添加依赖

mq的版本与连接的rocketmq版本保持一致

        <dependency>
            <groupId>org.apache.rocketmq</groupId>
            <artifactId>rocketmq-remoting</artifactId>
            <version>4.4.0</version>
        </dependency>

2、yml文件添加rocketmq配置

apache:
  rocketmq:
    #消费者的配置
    consumer:
      pushConsumer: myConsumer
    #生产者的配置
    producer:
      producerGroup: myGroup
    namesrvAddr: 192.168.233.128:9876  

3、生产者类RocketProducer

package com.zp.springbootdemo.rocketmq;

import com.alibaba.fastjson.JSONObject;
import com.sun.org.apache.xpath.internal.objects.XString;
import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.common.RemotingHelper;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.StopWatch;

import javax.annotation.PostConstruct;
import java.io.UnsupportedEncodingException;

/**
 * @Author zp
 * @Description rocketmq生产者
 * @Date 22:06 2020/5/22
 * @Param
 * @return
 **/
@Component
public class RocketProducer {
    /**
     * 生产者的组名
     */
    @Value("${apache.rocketmq.producer.producerGroup}")
    private String producerGroup;
    /**
     * NameServer 地址
     */
    @Value("${apache.rocketmq.namesrvAddr}")
    private String namesrvAddr;

    private DefaultMQProducer defaultMQProducer;

    @PostConstruct
    public void defaultMQProducer(){
        //生产者的组名
        defaultMQProducer = new DefaultMQProducer(producerGroup);
        defaultMQProducer.setNamesrvAddr(namesrvAddr);
        defaultMQProducer.setVipChannelEnabled(false);
        try {
            defaultMQProducer.start();
            System.out.println("producer启动了。。。");
        } catch (MQClientException e) {
            e.printStackTrace();
        }
    }

    public String send(String topic,String tags,String body) throws UnsupportedEncodingException, InterruptedException, RemotingException, MQClientException, MQBrokerException {
        Message message = new Message(topic,tags,body.getBytes(RemotingHelper.DEFAULT_CHARSET));
        StopWatch stop = new StopWatch();
        stop.start();
        SendResult result = defaultMQProducer.send(message);
        System.out.println("发送响应：MsgId:" + result.getMsgId() + "，发送状态:" + result.getSendStatus());
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("msgId",result.getMsgId());
        jsonObject.put("sendStatus",result.getSendStatus());
        stop.stop();
        return jsonObject.toJSONString();
    }
}

4、消费者类RocketConsumer

package com.zp.springbootdemo.rocketmq;

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.CommandCustomHeader;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

/**
 * @Author zp
 * @Description rocketmq消费者
 * @Date 22:33 2020/5/22
 * @Param
 * @return
 **/
@Component
public class RockerConsumer implements CommandLineRunner {
    /**
     * 消费者
     */
    @Value("${apache.rocketmq.consumer.pushConsumer}")
    private String pushConsumer;  //myConsumer

    /**
     * NameServer 地址
     */
    @Value("${apache.rocketmq.namesrvAddr}")
    private String namesrvAddr;

    /**
     * 初始化RocketMq的监听信息，渠道信息
     */
    public void messageListener(){
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer(pushConsumer);
        consumer.setNamesrvAddr(namesrvAddr);

        try {
            // 订阅PushTopic下Tag为push的消息,都订阅消息
            consumer.subscribe("firstTopic","push");
            // 程序第一次启动从消息队列头获取数据
            consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
            //可以修改每次消费消息的数量，默认设置是每次消费一条
            consumer.setConsumeMessageBatchMaxSize(1);

            //在此监听中消费信息，并返回消费的状态信息
            consumer.registerMessageListener((MessageListenerConcurrently) (msgs,context)->{
                // 会把不同的消息分别放置到不同的队列中
                for (Message msg:msgs){
                    System.out.println("接收到了消息："+new String(msg.getBody()));

                }
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            });
            consumer.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * Callback used to run the bean.
     *
     * @param args incoming main method arguments
     * @throws Exception on error
     */
    @Override
    public void run(String... args) throws Exception {
        this.messageListener();
    }
}

5、controller中编写发送消息

package com.zp.springbootdemo.rocketmq;

import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.remoting.exception.RemotingException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.io.UnsupportedEncodingException;

@RestController
@RequestMapping("/rocketMq")
public class MQController {

    @Autowired
    private RocketProducer producer;

    @RequestMapping("/myFirstProducer")
    public String pushMsg(String msg){
        try {
            System.out.println("======"+msg);
            return producer.send("firstTopic","push",msg);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (RemotingException e) {
            e.printStackTrace();
        } catch (MQClientException e) {
            e.printStackTrace();
        } catch (MQBrokerException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return "ERROR";
    }
}

6.测试

请求地址：http://127.0.0.1:8080/rocketMq/myFirstProducer?msg=hello

响应：{"msgId":"C0A8010E1A3818B4AAC2711E8CD50000","sendStatus":"SEND_OK"}

通过rocketMq可视化控制查看：